Answer:
V=18 m/s
Explanation:
Impulse is represented by Δp. It can be expanded such as: Δp = m(v-u) , where m is mass, v is final velocity, and u is initial velocity. (sorry ib physics things)
You can substitute your given values into the equation.
Δp = -2000 (i kept this as negative since it is going the opposite direction to your initial velocity)
m = 1000 kg
u = 20 m/s
1. -2000 = 1000(v-20) --> -2000/1000
2. -2 = v-20 --> -2 + 20
3. v = 18 m/s
You can always double check your answer by substituting it back into the original equation to make sure the Δp = -2000
